The advantage to purchasing bedding sets is that usually everything needed to put together a great look for your bed is included. The number of pieces included depends upon the size of the bed in a bag sets that you need. If it is not made clear, contact the seller and find out exactly what is included. When purchasing bed in a bag sets for a queen bed, you should look for the following: * One queen fitted sheet* One queen flat sheet* Two pillow cases* One queen comforter* Two or four pillow shams (some sets have 2 and some have 4)* Duvet cover (this is also optional; some sets have them, some do not)* Queen bed skirt (also optional) What is included in a king bedding set? This set should include the above mentioned items except in a king size. Many of the comforters are also reversible so they match either way you use them.